The Collaborative International Dictionary of English v.0.48:
Heptarch \Hep"tarch\, n. Same as Heptarchist. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Heptarchist \Hep"tarch*ist\, n. A ruler of one division of a heptarchy. [Written also heptarch.] [1913 Webster]